Research in this area has often consisted of cross-sectional studies examining how firearm outcomes differ in a particular year across states with different policies....
Therefore, as part of the Gun Policy in America initiative, RAND developed a longitudinal data set of state firearm laws that is free to the public, including other researchers, to support improved analysis and understanding of the effects of various laws....
All RAND tools undergo rigorous peer review to ensure both high data
综合
美国兰德公司-赛博战专栏
2022-06-29 00:00:00.0